[Tommyjo]

Even Dr Patrick Minnis, a NASA contrail scientist, was initally fooled by the video footage. His initial impression was that it was a missile launch. He later re-examined the video after discovering the contrail in a satellite image and researching with colleagues the atmospheric conditions.

Link to NASA article

[higgmeister]

Minnis usually studies contrails to determine their effect on Earth's climate. He and others have discovered that airplane contrails create cirrus clouds on days they wouldn't usually exist. Because of this, he calculates, the cirrus-cloud cover over the United States is increasing by one percent each decade and contributing to global warming by blocking the release of heat from the planet.

Your so called exert also thinks this so called aircraft contrail indicates an increase in Global Warming! What a kook!